DZone recently released my refcard „Getting started with MQTT“. I’m very happy with the result and I hope you’ll find it useful.
You can download the refcard here: https://dzone.com/refcardz/getting-started-with-mqtt
The refcard covers the following topics:
- Why MQTT?
- What Is MQTT?
- Publish / Subscribe
- MQTT Message Types
- Topics
- QoS Levels
- Last Will and Testament
- Retained Messages
- Clean / Persistent Sessions
- MQTT Clients
- Trying MQTT on the Command Line: Linux and Mac OS X
- Pub / Sub With Paho
- MQTT Over Websockets
- Scaling MQTT
- MQTT and Security
- New Features in the MQTT 3.1.1 Standard
